Juncaginaceae

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Juncaginaceae is a household of flowering plants, recognized by most taxonomists for the last few decades. Additionally, it is referred to as the arrowgrass family. It comprises 3 genera with a total of 34 known species (Christenhusz & Byng 2016).

The APG II system, of 2003 (unchanged from the APG system, of 1998), also recognizes this type of household and puts it in the purchase Alismatales, in the clade monocots. The species are found in temperate or cold areas in both the Northern and Southern Hemisphere. However, APG IV (2016) eliminated the genus Maundia because of the non-exclusive relationship and raised it to the monogeneric household Maundiaceae.

Description

Juncaginaceae are aquatic or marsh herbs with, leaves that are sheathing that is linear. The flowers are small and green in vertical spikes or racemes. The flower parts come in threes, but the carpels are either 6 or 3, combined to a superior ovary. The fruit is a capsule. Example arrowgrasses Triglochin comprise the Marsh Arrowgrass (Triglochin palustris), the Sea Arrowgrass (Triglochin maritima), along with other species such as Triglochin trichophora, Triglochin striata and Triglochin mucronata.

Categorization

The genus Maundia was set inside the family Juncaginaceae from the APG II. The newer APG III variant (2009), however, suggested it might be necessary to divide Maundia off to its monogeneric household, Maundiaceae, supported by the non-exclusive relationship of this genus into Juncaginaceae. This was achieved from the APG IV (2016), leaving just four genera in Juncaginaceae.

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